Electromagnetic controlling device.



H. J. KEATING.

ELECTROMAGNETIC CONTROLLING DEVICE.

APPLICATION FILED AUG. S 1912.

Patented Apr. 14, 1914.

v UNITED STATES PATENT OFFICE.

HARRY J. KEATING, OF CHICAGO,

ILLINOIS.

ELECTROMAGNETIC CONTROLLING DEVICE.

To all whom it may concern:

Be it known that I, HARRY J. KEATING, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Electromagnetic Controlling Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a. part of this specification.

My invention relates to electromagnetic controlling devices and has for its object the provision of an improved device which may impart motion to such mechanisms as advertising mechanisms or the like in which a slow motion of a reciprocating character is desired.

I will explain my invention more in detail by reference to the accompanying drawing in which- Figure 1 is a side elevation partly in section of my improved device; Fig. 2 sets forth the circuit arrangements, Figs. 3 and 1 are details of construction, and Fig. 5 is a detail of construction.

Referring more particularly to Fig. 1, I show two solenoids-1 and 2 which are mounted within a casing 3. In this casing there is likewise mounted'a dashpot 4 having a port 5 through which the air may escape, which port leads to a hollow stem 6 having a screw threaded interior. A screw 7 partly broken away may be screwed more or less into this stem to control the speed with which the air enters and leaves this dashpot. Each solenoid has a core respectively 8 and 9 which cores are united by means of a stem 10.

The general arrangement contemplates that first one solenoid and then the other shall draw its core into its interior, whereby certain circuit changes are effected as will presently appear. The core 8 carries at its extremity a piston 11 operating in the dashpot 4, and the operations of this piston in the dashpot control the speed with which the cores move in answer to the energization of their respective solenoids.

Referring to Fig. 1, it is assumed that solenoid 2 is about to 'be energized, whereupon its core 9 will be drawn to occupy a position entirely within the solenoid, whereby the piston, the core 9, and the core 8 move to the left until they are in their limit-- ing position. At this time by suitable instrumentalities to be presently explamecL' Specification of Letters Patent.

Application filed August 6, 1912.

Patented Apr. 14, 1914.

Serial No. 713,686.

the circuit through the solenoid 2 is broken and the circuit through the solenoid 1 is established. It will be understood that at this time the core 8 in its movement toward the left does not occupy the central position in the solenoid 1 as shown in Fig. 1 and consequently this core 8 will move in response to the energization of the solenoid 1 toward the right carrying with it the piston 11 and the core 9 until they again occupy the position shown in Fig. 1, at which time the circuit through solenoid 2 is established so that the movable parts again move toward the left. The speed of this movement is as before stated controlled by the opening permitted through the stem 6. The movable elements comprising the cores carry a rod 12 which has two arms 13, 13 adapted to engage a rocking bar 14, whereby the circuit changes are effected. This rocking bar is pivoted at 15 and a weighted arm 16 is likewise loosely pivoted at 15. This arm 16 has a slot 17 adapted to be engaged by a pin 18 carried by the rocking arm 14. iVhenever the cores move they carry along the rod 12 and thereby move the arm 14 from one limiting position to the other. As the arm 14, for instance, moves from the position shown in Fig. l in a clockwise direction, it carries with it the rocking arm 16 until the weight 19 carried by this arm 16 is moved to the opposite side of the vertical line through the pivot 15, whereupon this arm 10 quickly falls on account of the lost motion permitted by virtue of the slot 17 and pin 18 until the arm 20 of this bar 16 strikes a pin 21 carried by a rocking arm 22. This rocking arm 22 is mounted on the opposite side of a wall 23 which preferably forms part of the casing 3. This arm is pivoted at 24 and is held by means of a spring washer 25 in such a manner that it will occupy a position in which it is placed due to the blow occasioned by the arm 16. During the reverse movement of the cores it will be seen that the arm 26 of the rocking arm 16 is designed to engage a pin 27 carried upon the opposite extremity of the rocking arm These pins 21 and 27 are designed to engage insulating portions 28 and 29 insulatingly carried respectively by circuit changing springs 80 and 31. Circuit changing springs 32 and 33 respectively are associated with the springs 30 and 31, all of these springs being insulatingly mounted on the casing 3. Whenever either pi" 9-1 or 27 is in its spring engaging position the circuit through those particular springs is open as will readily appear.

In the action of the device therefore it will be clear that the device being in the position shown in Fig. l, solenoid 2 is thereby energized which slowly draws the cores to the left until they are near their limiting position when the arm 16 rapidly falls to change circuit conditions in such a way as to open the circuit through the solenoid 2 and -to close it through the solenoid l. The circuit arrangements will be clear from an inspection of Fig. 2. To the cores any suitable arm or connecting device may be attached which can transmit this slow reciprocating motion to whatever device it is designed to operate thereby.

It will of course be understood that in thus describing specifically one embodiment of my invention, I do not limit myself to the specific arrangement here set forth as the invention is capable of many modifications which would still be within the scope of the appended claims.

Having, however, thus described one form which my invention may take, what I claim as new and desire to secure by Letters Patent is:

1. In a device of the character described in combination with a pair of solenoids, a pair of cores, one for each solenoid, means for mechanically connecting said cores, pneumatic means to govern the speed of response of said cores to their respective solenoids, a circuit controlling device for each solenoid to control the flow of current therethrough, quick acting means interposed between said cores and said circuit controlling devices to control the said devices, and means for maintaining said circuit controlling devices between the actuations of said quick acting means in their last actuated position.

2. In a device of the character described in combination with a pair of solenoids, a pair of cores, one for each solenoid, means for mechanically connecting said cores, pneumatic means to govern the speed ofresponse of said cores to their respective solenoids, a circuit controlling device for each solenoid to control the flow of current therethrough, quick acting means interposed between said cores and said circuit controlling devices to control the said devices, and means for maintaining said circuit controlling devices between the actuations of said quick acting means in their last actuated p0 sition, said last aforesaid means including a rocking arm.

3. In a device of the character described in combination with a pair of solenoids, a pair of cores, one for each solenoid, means for mechanically connecting said cores, pneumatic means to govern the speed of response of said cores to their respective solenoids, a circuit controlling device for each solenoid to control the flow of current therethrough, quick acting means interposed between said cores and said circuit con-trolling devices to control the said devices, and means for maintaining said circuit controlling devices be tween the actuations of said quick acting means in their last actuated position, said last aforesaid means including a frictionally controlled rocking arm.

4. In a device of the character described in combination with a pair of solenoids, a pair of cores, one for each solenoid, means for mechanically connecting said cores, pneumatic means to govern the speed of response of said cores to their respective solenoids, a circuit contro ling device for each solenoid to control the flow of current therethrough, quick acting means interposed between said cores and said circuit controlling devices to control the said devices, and means for maintaining said circuit controlling devices between the actuations of said quick acting means in their last actuated position, said last aforesaid means including a frictionally controlled rocking arm, said quick acting means including a weighted arm and a tilting arm controlled by said cores, the connection between said tilting arm and said weighted arm permitting lost motion between-them.

5. In a device of the character described in combination with a pair of solenoids, a pair of cores, one for each solenoid, means for mechanically connecting said cores, pneumatic means to govern the speed of response of said cores to their respective solenoids, a circuit controlling device for each solenoid to control the flow of current therethrough, quick acting means interposed between said cores and said circuit controlling devices to control the said devices, and means for maintaining said circuit controlling devices between-the actuations of said quick acting means in their last actuated position, said last aforesaid means including a frictionally controlled rocking arm, said quick acting means including a weighted arm and a tilting arm controlled by said cores, the connection between said tilting arm and said weighted arm permitting lost motion between them, said weighted arm controlling said frictionally controlled arm.

In witness whereof I hereunto subscribe my name this 22nd day of July, A. D., 1912.

HARRY J. KEATING.

Witnesses:

J. P. QUIRK, M. L. Rononns. 

